\(K_2O\rightarrow K_2O\)
\(NaO\rightarrow Na_2O\)
\(CaCO_3\rightarrow CaCO_3\)
\(Mg\left(OH\right)_2\rightarrow Mg\left(OH\right)_2\)
\(HCl\rightarrow HCl\)
\(Zn_2O\rightarrow ZnO\)
\(Fe_2O_3\rightarrow Fe_2O_3\)
\(AlO\rightarrow Al_2O\)
CTHH sai+sửa
NaO--->Na2O
AlO--->Al2O3
Zn2O---->ZnO